/*
 * Copyright (c) 2018, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */
package com.oracle.svm.core.os;

import java.util.EnumSet;

import org.graalvm.word.PointerBase;
import org.graalvm.word.UnsignedWord;

public abstract class AbstractCommittedMemoryProvider implements CommittedMemoryProvider {

    @Override
    public boolean protect(PointerBase start, UnsignedWord nbytes, EnumSet<Access> accessFlags) {
        int vmAccessBits = VirtualMemoryProvider.Access.NONE;
        if (accessFlags.contains(CommittedMemoryProvider.Access.READ)) {
            vmAccessBits |= VirtualMemoryProvider.Access.READ;
        }
        if (accessFlags.contains(CommittedMemoryProvider.Access.WRITE)) {
            vmAccessBits |= VirtualMemoryProvider.Access.WRITE;
        }
        if (accessFlags.contains(CommittedMemoryProvider.Access.EXECUTE)) {
            vmAccessBits |= VirtualMemoryProvider.Access.EXECUTE;
        }
        int success = VirtualMemoryProvider.get().protect(start, nbytes, vmAccessBits);
        return success == 0;
    }

}
